Amazing Space Web Site, 3-12

http://amazing-space.stsci.edu
Amazing Space consists of interactive presentations and activities about space developed at the Space Telescope Science Institute by teachers, scientists, and engineers. All lessons include photographs taken by the Hubble Space Telescope and many high-quality graphics, videos, and animations designed to enhance student understanding and interest. They are accurate, classroom-friendly, visually appealing, and carefully created resources that meet accepted educational standards.
Check out the following sections:

• Hubble’s Servicing Mission 4
• Online Explorations
• The Star Witness News
• Capture Cosmos (Astronomy materials by topic)
• Tonight’s Sky
• Homework Help

In addition, the Teaching Tools index gives teachers an "overview" of the resources available on the site and suggests ways to use them in the classroom as well as provides links to related materials.